Evolution Genetics Genomics Intelligent Design stasis

Ghost worms unchanged in form for 275 million years but show “highly distinct” genetics?

One wants to ask, how distinct ARE the genomes of these species that all look the same?
Would it be like mapping a cat’s genome and finding a German Shepherd’s GATTACA in there? What that level of distinction really tells us goes well beyond cats and German Shepherds. Or do the researchers really mean something less highly distinct? What? We search for analogies here.